Problem 2 (25 points) Express x (t) = cos(wot) + 3 cos (wot −7) + sin(wot) as a single sinusoid and sketch it. (Hint 1: Convert the sinusoids to phasors, then add the phasors by sketching them as vectors first) (Hint 2: Recall that sin(0) = cos (0 - ))

Fig: 1